OF GALWAY. 81 



Lagena trigono-l^vigata (pi. III., Fig. 6). — The aperture 

 is formed by tri-radiating slits. 



Lagena faba (PL II., Fig. lo). — Is oval in equatorial section. 

 Seen on edge the outline would be cordate lanceolate, with 

 everted lips. These lips enclose an elliptical, funnel-shaped dia- 

 phragm ; surface rough, like that of an orange. • Outline broadly 

 circular truncate, the elliptical mouth forming a straight edge when 

 viewed laterally ; two narrow, curved, opaque white bands, nearly 

 joining at the bottom, extend three-quarters up each side within 

 the margin of each face of shell ; internal tube central and free, 

 as in Z. hicida. Very common ! 



Seguenza, in his "Foraminiferi Monotalamici" (PL I., Fig. 60), 

 figures a form similar in outline, but describes it (page 60) as 

 having an acute keel ; he names it Fissuriiia aperta. 



Lagena quadrata (PL II., Fig. 8). — Oblong, in outline more 

 or less quadrangular ; it varies in proportions of length, breadth, 

 and thickness. 



Lagena quadrata, variety, Semi-Alata (PL IL, Fig. 9). — 

 Has a simple wing, connecting the neck with the shell. 



This pretty variety of L. quadrata^ figured by Williamson, 

 seems worthy of a distinctive name. 



Lagena Marginata (PL III., Fig. 2). — Transparent, smooth, 

 with but one keeL In this, L. Orbignyana and allied forms, the 

 tube adheres to one of the inner surfaces of the shelL The mouth 

 of the tube opens mostly on the opposite face in this species ; 

 contour nearly circular. 



Lagena trigono-elliptica (PL III., Fig. 8). — This specimen 

 has one keel at each angle; the tube is central and very short. In 

 shape this is elliptical, and in cross section triquetrous. 



A similar form is described by Seguenza, under the name of 

 Trigonulina globosa, but this specific name is occupied, as is also 

 the more appropriate one of trigono marginata. 



Lagena pedunculata (PL III., Fig. 3). — x\n interesting 

 variety of marginata., figured by Seguenza, loc. cit., PL 2, Fig. 4, 

 page 60. 



Lagena Orbignyana (PL III., Fig. i). — Has three keels, the 

 central one broadest ; surface smooth. 



Lagena trigono-Orbignyana (PL III., Fig. 10). 



Lagena pulchella (PL II., Fig. 13). — A variety of L. Orbig- 

 nyana., the surface marked with branching costse. 



Lagena trigono-pulchella (PL III., Fig. 11). — Also found 

 by Balkwill and Wright in Dublin waters, and recorded as L. 

 pulchella. 



